Support for api-resolver as a technique

The documentation for [swhid](https://cyclonedx.org/docs/1.6/json/#components_items_swhid) suggests to include an evidence for identity.

Often the swhid could be obtained by performing a search (manual and automated) on the official site https://archive.softwareheritage.org

Consider adding `api-resolver` as a [technique](https://cyclonedx.org/docs/1.6/json/#components_items_evidence_identity_oneOf_i0_items_methods_items_technique) and the value being the full search url used to retrieve the IDs.